Cache is not created with mode 0777

Cache is not created with mode 0777. Then it's impossible to delete it.

Code:
Nette/Configurator.php:258

is:

if (!is_dir($dir)) {
	mkdir($dir, 0777);
}

It probably should be right:

if (!is_dir($dir)) {
	$old = umask(0);
	mkdir($dir, 0777);
	umask($old);
}